The market price of labour is the price which is really paid for it, from the natural operation of the proportion of the supply to the demand; labour is dear when it is scarce, and cheap when it is plentiful. However much the market price of labour may deviate from its natural price, it has, like commodities, a tendency to conform to it. It is when the market price of labour exceeds its natural price, that the condition of the labourer is flourishing and happy, that he has it in his power to command a greater proportion of the necessaries and enjoyments of life, and therefore to rear a healthy and numerous family. When however, by the encouragement which high wages give to the increase of population, the number of labourers is increased, wages again fall to their natural price, and indeed from a re-action sometimes fall below it. When the market price of labour is below its natural price, the condition of the labourers is most wretched: then poverty deprives them of those comforts which custom renders absolute necessaries. It is only after their privations have reduced their number, or the demand for labour has increased, that the market price of labour will rise to its natural price, and that the labourer will have the moderate comforts, which the natural price of wages will afford. Notwithstanding the tendency of wages to conform to their natural rate, their market rate may, in an improving society, for an indefinite period, be constantly above it; for no sooner may the impulse, which an increased capital gives to a new demand for labour be obeyed, than another increase of capital may produce the same effect; and thus if the increase of capital be gradual and constant, the demand for labour may give a continued stimulus to an increase of people. Capital is that part of the wealth of a country, which is employed in production, and consists of food, clothing, tools, raw material, machinery, &c. necessary to give effect to labour. Capital may increase in quantity at the same time that its value rises. An addition may be made to the food and clothing of a country, at the same time that more labour may be required to produce the additional quantity than before; in that case not only the quantity, but the value of capital will rise. Or capital may increase without its value increasing, and even while its value is actually diminishing; not only may an addition be made to the food and clothing of a country, but the addition may be made by the aid of machinery, without any increase, and even with an absolute diminution in the proportional quantity of labour required to produce them. The quantity of capital may increase, while neither the whole together, nor any part of it singly, will have a greater value than before.